From: Wesley J Landaker <wjl@...>
Date: 2003-05-31T08:59:45+09:00
Subject: Re: regexp operators

On Friday 30 May 2003 5:41 pm, nobu.nokada@softhome.net wrote:
> Hi,
>
> At Sat, 31 May 2003 03:26:53 +0900,
>
> Wesley J Landaker wrote:
> > So I whipped this out really quick. It lets you combine regexp by
> > adding them (+), ORing them (|) or by including them
> > /blah#{some_regexp}blah/ inside each other, while preserving all
> > flags. (At least, all flags that can be preserved--I can't do
> > anything about the encodings if they mismatch... but I use all
> > UTF-8 regexps, so I always use 'u'). This could potentially be
> > extended to support other operations--but I haven't needed them yet
> > on the project I'm tinkering with.
>
> Flags are preserved in 1.8.
>
> $ ruby -v -e 'p(/#{/foo/m}/)'
> ruby 1.8.0 (2003-05-31) [i686-linux]
> /(?m-ix:foo)/

I hadn't tried this in 1.8 yet, so that's cool to see that it has built 
in a to_s similar to the one I posted. Nice! =)

Mine also does the + and | operators, as well, though; I'm not sure if 
that's universally useful.

Looks like 1.8 still doesn't catch encoding flag in this case; there  
doesn't appear to be any '(?' prefix that changes encodings, though, 
which would be a prerequisite. (Personally, I'm happy with UTF-8. ;)

$ ruby -v -e 'p(/#{/foo/mu}/)'
ruby 1.8.0 (2003-05-31) [i686-linux]
/(?m-ix:foo)/

-- 
Wesley J. Landaker - wjl@icecavern.net
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